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4.4 Power over Ethernet
Power over Ethernet is one of the key features of JetNet 5728G series. It is fully
IEEE802.3af-2003 compliant, and support IEEE802.3at, including 2-event and LLDP
classification. JetNet 5728G adopts up to 24-Port PoE injectors in port 1 to port 24, each
port with the ability to deliver a 606mA current.
The following commands are included in this section:
4.4.1 PoE Control
4.4.2 Emergency Power Management
4.4.3 PD Status Detection
4.4.4 PoE Scheduling
4.4.5 PoE Status
4.4.6 Command Line for PoE control
4.4.1
PoE Control
In WiMax systems, Wireless APs, and high-end PoE applications, there are various types
of PDs, for instance, IEEE 802.3af, IEEE 802.3at 2-event, IEEE 802.3at LLDP, and
non-standard type. To be compatible with different PDs, JetNet 5728G series is the
world
’
s first rackmountHigh Power PoE switch, designed with 4 powering modes,
including IEEE 802.3af mode, IEEE 802.3at 2-event mode, IEEE 802.3at LLDP
classification mode as well as forced powering mode to meet all of the PD types in the
industry. As a result, they can be flexibly used to deliver power for different PoE-enabled
devices in various applications.
IEEE 802.3at LLDP provides smart power budget control behavior to fulfill the needs of
higher end setups requiring exact high power delivery. By using the ongoing dynamic
re-negotiation function of the IEEE802.3at LLDP, the JetNet 5728G series can perform
more intelligently by dynamically reallocating power to the PDs. JetNet 5728G series
implements the 2-event and Link Layer Discovery Protocol (LLDP) PoE into the system for
efficient power budget negotiation between PSE and PD devices.
Pull down the Powering Mode column can change the Powering Mode to IEEE 802.3af,
802.3at(LLDP), 802.3at(2-Event) or forced mode. When the column is IEEE 802.3af, if and
only if the PD is follow IEEE 802.3af then JetNet 5728G series could deliver power. If the
Powering mode is 802.3at(LLDP) or 802.3at(2-Event), JetNet 5728G series would deliver
power to PD that supports IEEE 802.3at LLDP or 2-Evnet feature. But if the Powering
Mode changes to forced mode, once the PoE mode is enabled, the port will directly deliver
power even there is no Ethernet cable plugged. Please be careful when using forced
mode.